ZnO/Ag porous nanosheets used as substrate for surface-enhanced Raman scattering to detect organic pollutant

Abstract

Self-assembled porous ZnO nanosheets were fabricated through an one-step solvent method which is convenient and environmentally friendly, and then silver nanoparticles were deposted on to it to make a type of hybrid material. The ZnO/Ag composite was used as the substrate for surface enhanced Raman scattering (SERS) to measure the Rhodamine 6G (R6G) molecules. Strong SERS signals were obtained when the concentration of the probe molecules was as low as 10 À13 M. Besides, the substrate exhibited light-assisted self-cleaning properties under UV irradiation. Thus, the as-prepared nanomaterials showed potential application for environmentally friendly and economical organic pollutant detection.

Ultrasensitive Surface‐Enhanced Raman Spectroscopy Detection Based on Amorphous Molybdenum Oxide Quantum Dots

“…Based on the electromagnetic mechanism, plasmonic materials such as noble metals can be used as effective surface‐enhanced Raman spectroscopy (SERS) substrates in which a huge electromagnetic field is produced and the Raman signal of the probe molecule is greatly magnified . As a powerful analysis technique present now, SERS has been widely employed in the life sciences for food security, chemical catalysis, biomolecule and trace chemicals detection, etc . However, the scarcity and high cost of noble metal limited their wide applications.…”

Advances in surface‐enhanced Raman scattering bioprobes for cancer imaging

“…In hybrid SERS platforms, huge SPR‐induced electromagnetic field can be obtained by closely packed metal nanoparticles; the gap distance between metal nanoparticles is adjusted by the supported metal oxide material. [ 56,57 ] Besides, additional photoinduced interfacial charge transfer process is introduced in the metal–metal oxide SERS heterostructures, [ 12,58,59 ] by four possible charge transfer pathways: (1) metal oxide‐to‐molecule‐to‐metal; (2) metal‐to‐metal oxide‐to‐molecule; (3) metal‐to‐molecule‐to‐metal oxide; and (4) molecule‐to‐metal oxide‐to‐metal. The boosted electromagnetic field and charge transfer process synergistically endows metal–metal oxide hybrid substrates with higher SERS enhancement.…”

Linear chains of Ag nanoparticles embedded in dielectric films for SERS applications in analytical chemistry

“…4 As a powerful analysis method, SERS is employed in the elds of chemistry, material sciences and life sciences, for food security, chemical or biological catalysis, biochemistry, detection of trace chemicals, etc. [5][6][7][8][9][10] However, the SERS process is strongly dependent on the chemical nature of the detected molecules, so that a strong selectivity between molecules may occur in case of different components in mixtures. In particular, if one species of the mixture is easily involved in strong interactions with the noble metal and not the others, the balance tilts overwhelmingly in favour of this molecular family against other families.…”